Miniature phonograph



4, 1934e l.. J. GRUiswlAli l MINIATURE PHONOGRAPH 3 Sheets-Sheet l FiledFeb. 19, 1934 lNvr-:NToR @i8 Leo J. Grubman N. v d, M ATTORNEYSMINIATURE PHONOGRAPH Filed Feb. 19, 1934 3 Sheets-Sheet 2 lol '00INVENTOR 36 Leo J. Grubman 26,6664" BY/M ATTORNEYS' D- 4%11934 L. J.GRUBMAN 1,983,078

` MINIATURE PHONOGRAPH Fil-ed Feb. 19, 1934 5 Sheets-Sheet -3 WMIIIIlIlllllIlllIIIIIIIIIIIIIIIIIIIIIIIIHI Patented Dec. 4, 1934 1,983,078MINIATURE PHONOGRAPH Leo J. Grubman, Belle Harbor, N. Y., assigner toVoices, Incorporated, Newark, N. J., a corporation of DelawareApplication February 19, 1934, Serial No. 711,882

20 Claims.

This invention relates to phonographs, and more particularly to acompact self-contained miniature phonograph.

Tb` primary object of the present invention is to generally improveminiature phonographs such as are adapted for use in dolls, animal toys,and the like. A more particular object of my invention resides in theprovision of an improved sound box mounting which will afford movementof the l0 stylus and sound box, both for feed of the stylus across therecord and disengagement of the stylus from the record, all whilekeeping the sound box and record in close compact arrangement andwithout necessitating that the phonograph be held strictly' in uprightposition for successful operation. Still another object of my inventionresides in the provision of a central control cam system for controllingthe resetting and engagement of the stylus, this mechanism beingsimplified by limiting the cam mechanism to a single revolution or lessduring the complete operation of the phonograph. Another object is theprovision of a single operating means manipulation of which issufiicient for operation of the phonograph. In the present case thisoperating means is a rewind knob rotation of which rewinds thephonograph, and, at the end of the rewinding operation, the phonographis automatically started. Still further objects center about the generalorganization and arrangement of the important parts of the phonographwithin the phonograph casing, the casing taking the form of acylindrical housing disposed with its axis horizontal and having one endclosed and its opposite end open for sound emission, and provided withthe rewind knob. This arrangement is suitable for use in a doll, thesound emission and rewind end of the phonograph being disposed at theback of the doll.

To the accomplishment of the foregoing and such other objects as willhereinafter appear, my invention consists in the phonograph elements andtheir relation one to the other, as hereinafter `are more particularlydescribed in the speciiication and sought to be dened in the lclaims.`The specification is accompanied by drawings in which:

Fig. 1 is a vertical section taken through a 50 miniature phonographembodying features of my invention;

Fig. 2 is a section taken in the plane of the line 2--2 of Fig. 1;

Fig. 3. is a section taken in the plane of the line 3--3 of Fig. 2,showing the stylus arm;

Fig. 4 is a horizontal section taken in the plane of the line 4-4 ofFig. 1;

Fig. 5 is a vertical section taken in the plane of the line 5--5 of Fig.1;

Fig. 6 is a plan view of the control cam and re- 60 wind mechanisms;

Fig. 7 is a similar view showing the parts during the playing of thephonograph;

Fig. 8 is a similar view showing the parts at the end of the playing ofthe phonograph;

Fig. 9 is an end view of the cam mechanism shown in Fig. 6, andindicates the start of the playing operation;

Fig. 10 is a similar view during the playing operation;

Fig. l1 is a similar view but at the end of the playing operation; and'Fig. 12 is a view. similar to Fig. 6 but showing Referring to thedrawings, the phonograph comprises a record R, and a sound box anddiaphragm assembly D, said assembly carrying a stylus S projecting overand cooperating with the record R. The resetting and engagement ofstylus S is controlled preferably through the sound box assembly D by anappropriate cam system C. The cam mechanism C and the record R areinterconnected by appropriate step-up gearing and are driven by a mainspring M, the speed being limited by an appropriate governor G (Fig. 1)85 and the spring M being rewound by means of a knob K.

The mechanism of the phonograph of Figs. 1 through 1l is somewhatcomplicated by the provision of an easily turned rewinding knob K whichis geared, through reduction gearing, to the main spring M. Thephonograph in more simple form may be provided with a rewind knobmounted directly on the cam shaft, and will accordingly rst be describedin the simpler form. For this purpose reference may also be made to Fig.12, showing a rewind knob K mounted on the shaft of cam mechanism C.Other slight changes accompanying this simplification will be developed-later in the specification.

Sound reproducing system Referring to Figs. 1 through 4, the sound reproducing system comprises a diaphragm 12 clamped 105 between rings 14 and16 within a sound box consisting of a closed preferably dished rearplate 18 and a hanged front plate 20, the central portion 22 of which isopen for sound discharge. The plate 18 is projected upwardly to form thetop arm 110 24, downwardly to form the bottom arm 26, and sidewardly toform the stylus mounting and weight carrying arm 28. Arms 24 and 26 areprovided with vertical trunnions 30 which are in alignment and whichextend transversely of the sound box assembly D. Trunnions 30 arereceived in bearing arms 32 and 34, preferably formed integrally withand connected by av base portion 36 secured to the inner end 38 of amotor frame 40.

Stylus S is mounted at one end of a stylus arm 42 formed of a singlepiece of sheet metal having a part 44 extending in a vertical plane andforming a bearing for the stylus arm, and another part 46 extending in aplane tilted upwardly from the horizontal and connected to the diaphragm12. The stylus arm is made of light weight metal to reduce its inertia,while the sound box assembly is made relatively heavy to increase itsinertia, so that lateral vibration of the stylus produces vibration ofthe diaphragm 12 without oscillating the sound box assembly about thetrunnions 30. Trunnions 30, however, permit movement of the l sound boxassembly during the travel or feed of the stylus in the sound grooves ofthe record.

When the sound box'is pivoted somewhat off-center, as is here the case,the assembly is balanced by the addition of a weight 48 secured to arm28. This insures that the stylus will track freely in the sound grooveeven though the phonograph be tilted at a substantial angle away fromthe normal playing position. At the same time, the total mass andinertia of the sound box is increased.

The stylus arm 42 is pivoted on the sound box assembly by forming anouter knife edge 50 (Fig. 3) and an inner knife edge 52 at the top andbottom of the vertical part 44 of the stylus arm, which knife edges areseated in mating recesses or bearings formed on the outer and innerfaces of the sound box arm 28. The stylus arm is held in position byleaf springs 54 and 56 mounted on arm 28 by appropriate screws 58 (Fig.2) and urging the fulcrums 50 and 52 into their respective seats. Itwill be appreciated that the springs 54 and 56 are intended to hold thestylus arm in position when the stylus is disengaged from the record,because when engaged the pressure on the stylus itself serves to seatthe fulcrums more firmly in place. In passing, it should be observedthat the arm 44 is so shaped that the springs 54 and 56 bear againstedges substantially in alignment with the fulcrums 50 and 52, so thatthe springs do not set up any resistance to free vibration of the stylusarm.

In order to prevent excessive stylus pressure, the weight of the soundbox assembly is partially compensated by a leaf spring (Fig. 1) securedat 62 to the plate 36 and having its free end 64 bent upwardly against athrust bearing 66 on the sound box by means of an adjustment screw 68threaded in arm 34 and locked by nut 70. The stylus pressure may beadjusted to any desired value by adjustment of screw 68.

The sound reproducing system includes, in addition to the sound boxassembly, the casing 72 which acts as an amplifying chamber or horn. Oneend of casing 72 is closed by a cap 74. 'Ihe .'otl'i'e'r end is providedwith-.a cap 76, but this is largely cut away or provided witha'largenumber of sound discharge holes 78 for free soundl vides adamping of the diaphragm which is desirable and which improves the tonequality.

Record rotating mechanism The record rotating mechanism is carried in adished or cup-like frame member 40 the open end of which isflared'outwardly at 80 and secured to Athe end plate 76, which itselfforms a part of the motor frame. The plate 76 is threaded onto the endof cylindrical casing 72.

The main spring M is here shown of the helical type and is anchored at82 to plate 76, as is best shown in Fig. 6. The opposite end of thespring is received in a collar 84 pinned to shaft 86 journaled in plates76 and 38 of the motor frame. Shaft 86 carries a gear 88 meshing with apinion 90 in turn mounted on shaft 92 carrying a sleeve 94 lockedthereto by set screw 96 (see Fig. l). A helical gear 98 is mountedloosely on sleeve 94, being held against axial movement in one directionby a collar 100 locked to the sleeve by a set screw 102. The helicalgear 98 and the sleeve 94 are interconnected by a coiled slip spring 104which has been omitted in Figs. 6, 7, and 8 but which is clearly shownin Fig. l. The spring is wound in such direction that it is self-loosening during the rewinding operation, thereby dispensing with rotation ofthe succeeding gear train and record during rewinding. The spring isself -tightening during unwinding of the spring, resulting in rotationof helical gear 98 with shaft 92. A similar description is applicable tothe rotation of gear 98 by shaft 92 in the simplified modification ofFig. 12,

Helical gear 98 meshes with a mating helical orlworm gear 106 formeddirectly on a shaft 108 which at its lower end carries a flanged recordsupporting member 110, The record R is clamped between member 110 and acollar 112 screwed upon a threaded extension 114 of record supportmember 110. The record shaft 108 is carried in an uppervbearing 116 andan adjustable lower bearing 118 adjustment of which is fixed by a locknut 120. It will be noted from inspection of Fig. 2, that shaft 108extends diametrically of the casing 72; that the record is disposed inthe lower part of the casing with its recorded face on top or toward thedrive mechanism; and that the wall 38 of the motor frame and the base 36of the sound box support are cut away to clear the record, as well asfor sound transmission.

The drive mechanism further includes governor G. Record shaft 108 isprovided with a helical gear 122 which in the present case is riveted onand forms a part of the record support 110. Gear 122 meshes with matinggear 124 mounted on governor shaft 126. This carries a governorconsisting of fixed and movable frustro-conical plates 128 and 130between which are carried a series of balls 132. Upon rotation of thegovernor shaft, the balls 132 tend to fly outwardly, causing movement ofdisc 130 away from disc 128, this movement being resisted by a lightcompression spring 134. Axial movement oi disc 130 brings it intocontact with a fixed brake shoe 136 adjustably mounted by means of a setscrew 138 on an arm 140 which extends to and is formed with the base 36.It will be understood that because of the conicity of the outer surfaceof governor disc 130, a simple adjustment of brake screw 138 toward oraway from the governor shaft produces adjustment of the phonographoperating speed.

` A r The. control mechanism C includes1annmber -o'fcamst whichfmay bedistributed as desired Vto the largeradius path, and yet large enough toStylus control mechanismV on a single cam shaft, but which arepreferably here nested together. Referring to Figs. 1 and 4, the top-arm24 of the sound box. assembly is'projected to support a cam follower 142which rides.

Y, semblyglthereby disengaging the stylus from the record. The shape andconstruction of rider 146 will `be evident fromr examination of Figs. 4through 11.0f the drawings. Therider includes a cam follower'portion148which rides upon. a stylus lift cam formed at the end of the cylindricalmember in which the reset cam 144 is cut.

During theplaying ofthe phonograph, thefollower 148 rests in a cut-awayApart 15.0 of the` cam, asis clearly shown in Fig. 10, thus permitting`the stylus to rest upon the record. .At the end` of the record playingoperation, a stylus `lifting portion 152 engages follower 148, as isshown in Fig. 11, thereby disengaging the stylus from the record.`During therewinding operationthe` follower -148 rides in elevatedposition` on. the full radius path 154.just inside the cutaway part 150,as is clearly shown in Fig. 5 of thedrawings, The rider 146 is slldableaxially of the cam in order to permit shifting from the small radiuspath150, to the: large radiuspath 154, and vice versa.

Referring to Fig. 12, it will be observed that the rider 146 isnormally-urged'inwardly by a leaf ,spring 156. This spring has beenomitted in Figs. 9, 10 and 11 in order to simplify the'drawings. Itwillbe manifest from inspection of Fig. l1 `that at the end of theplaying operation when the elevated portion 152 reaches follower 148,the rider is moved orsshiftedinwardly by spring 156. to the large radiuspath 154, as is shown in Fig. 8, this resulting from the factthat theraised portion 152 of path .150 is flush with thelarge radius path 154.VDuring the rewinding operation the follower 148 remains on thefullradius path, as is shown in Fig. 5, thus keeping the stylus elevatedfrom the record. A't the same timer-helical cam` 144 resets thestylus"to initialposition.

At thevendof Athe rewinding operation the rider 146 is lshiftedoutwardly to. the small radius path 150,v thus permitting .the stylus to`again engage thevrecord. This outward movement is produced by a-ridershifting cam or knockout 160 whichis secured to ..the. outer face ofgear 88 andv which cooperateswithja part 162 depending `from rider 146'radially ofthe cam. mechanism.r As will be evident from. aninspectionof Figs. 6 and 9,'when .the rider shiftingcam `160 reachessurface 162 at the endI of the .winding operation, the rider isshiftedoutwardly'to the jsmall radius path 150,

so thatxupon unwindingior playing of the phonograph'the stylus isloweredinto engagement with the record. In order` to permit the record toaccelerate to normal playing speed, the actual con- 4tact of the styluson the record may be postponed, :and lfor this `purpose the small radiuspathv may include a section1164 having a radius less than thepart,l52,so that .therider cannot shift back prevent engagement of thestylus with the record. During travel in section 164, the record isaccelerated, and at the beginning of small radius path 150 the styluscomes into engagement with the record. It will be understood that thesame resultmay, if desired,be accomplished by prolonging the full radiussection 152 to include the intermediate radius section 164, and at thesame time vprolonging the shift cam 160 to prevent return movement ofthe rider until it rests in the small radius path 150.

Assuming the rapparatus to be provided with the directly connected knobK', as shown in Fig.l

12, to operate the phonograph it is simply necessary to grasp the knobK' and turn it from its unwound to its wound position by a singlecontinuous rotative movement of slightly less than one revolution.During this movement the stylus is reset .to initial position by camgroove 144, the` stylus meanwhile being elevated by rider 146 resting onthe large radius path 154. The main spring is, of course, being rewound,but the record is not rotated due to slippage of clutch spring 104 whichpermits helical gear 98 to remain stationary despite rotation of pinion90 meshing with gear 88. At the' end of the winding movement the rider146 is shifted outwardly by rider shifting cam 160. Upon release of knobK the parts rotate in opposite direction under the influence of springM. Record R is rotated, and at the same time or .after slight delay thestylus engages the record, and the phonograph. is played. To preventshock to the parts at the end of the winding operation, the gear 88 ispreferably provided with a stop 166, best shown in Figs. 6, 7, and 8,which may be formed opposite andintegrally with the knockout 160. Afixed abutment 168, mounted on frame plate 38, cooperates with the stop166 to positively limit the movementof the shaft 86. Where the controlmechanism C is designed to rotate almost a full revolution, as in thepresent casethe single abutment 168 serves as a motion limiting stop inboth directions. If desired, the movement of shaft 86 maybe limitedsubstantially below a full revolution, say to approximately a halfrevolution, this being more convenient when using a direct operationknob such as the'knob K', in order not to require excessive twist in asingle movement.

Rewinding mechanism The-mechanism of Figs. 1 through 11 differs from themodification of Fig. 12 primarily in rewinding the phonograph throughthe agency of .shaft 92 rather than the cam shaft 86. This results. ineasier winding, due to the large gear reduction, and also is more`convenient when a substantially complete revolution of the cam shaft isutilized. Referring to Fig. 1, the knob K is mounted on the drivingportion 170 of a rew.nd clutch. A slip sprng 172, having one end securedto the plate 76 at 174, acts as a ratchet to prevent return or unwindingmovement of the knob. Shaft 92 carries a driven clutch element 176 andis limitedly axially reciprocable to provide engagement or disengagementof the clutch. y

Referring; now to Figs. 6, 7, and 8, the rewind mechanism is clearlyshown, except that the slip springs 104 and 172 on helical gear 98 andknob K, respectively, have been omitted for simplicity. The shaft 92 isprovided with a collar 178 nested withinrlder 146,.in consequence ofwhich the rider and shaft are shifted together.

Pinion 90 is of suiiicient width to remain in engagement during axialshifting of shaft 92, this being evident from comparison of F.gs. 6 and7 with Fig. 8. It will be evident that at the end of the rewindingoperation, as shown in Figs. 6 and 9, the rider shifting cam 160 movesrider 146 outwardly not only to permit stylus engagement, but also todisengage the clutch members 170 and 176, thus initiating operation ofthe phonograph in the direction of the arrow. During reproduction of therecord, the rewind clutch is held disengaged, as is shown in Figs. 7 and10. At the end of the playing operation of the phonograph when rider 146is elevated by the cam portion 152, thus disengaging the stylus, therider moves inwardly with shaft 92, thereby bringing the clutch parts170 and 176 into engagement, as shown in Figs. 8 and 1l. If the positionof knob K is such as to prevent clutch engagement, this engagement takesplace when the knob is turned to begin rewinding the phonograph. Theshaft 92 and rider 146 are, of course, constantly urged inwardly by aspring 156, best shown in Figs. 4 and 5, th.s spring being omitted inFigs. 6 through 11, and corresponding to spring 156' in Fig. 12.

It will now be evident that the arrangement of Fig. 12 dillers from thatof Figs. 1 through l1 in omitting the collar 178, thus permitting shaft92 to remain ax ally fixed. The rewind clutch and ratchet spring 174are, of course, unnecessary. The spring 156 is applied directly to rider146 instead of being applied to the end of shaft 92.

Operation The phonograph is placed in a doll body through the back. theaxis of the cylinder being arranged horizontally when the doll s heldvertically. The sound discharge end 76 as well as the rewind knob arelocated at the back of the doll and may be concealed by the clothing ofthe doll. The doll can bc tilted through considerable angle withoutspoiling the operation of the phonograph, although it cannot be heldhead downwardly. The phonograph is normally in unwound condition. withthe stylus elevated. Upon turning the rewind knob, the phonograph iswound up and the stylus reset to initial position. Upon completion ofthe rewinding operation the rewinding clutch is disengaged and thephonograph begins to run. Slightly after beginning operation the stylusis lowered onto the record and the record played. During playing of therecord, the stylus tracks naturally in the sound groove, there beingsome play .'n the reset cam groove 144. This groove may, in fact, be cutaway so as not to force the stylus feed at all but to act merely as areset cam. In the present case the groove is shaped to force the stylusfeed should it fail to track properly and begin to play a single grooverepeatedly. At the end of the playing operation, the stylus is elevated;the rider is shifted to the large radius cam path in order to hold thestylus elevated during the rewinding operat on; and the rewinding clutchis engaged.

With the arrangement shown in Fig. 12, the rewind handle is simplygrasped, twisted and released, release of the handle initiating playingof the phonograph.

It is believed that the mode of constructing and using, as well as themany advantages of my improved miniature phonograph, will be apparentfrom the foregoing detailed description thereof.

It will also be apparent that while I have shown my invention inpreferred forms, many changes and modifications may be made in thestructures disclosed, without departing from the spirit of theinvention, dened in the following claims.

I claim:

1. A miniature 'phonograph comprising a record, a sound box disposednear the record, a stylus arm projecting from the sound box toward andover the sound grooves on the record. and trunnions projectingtransversely of the sound box at opposite edges for pivoting said soundbox for feed of the stylus over the record', said sound box beingreciprocable on said trunnions for engagement and disengagement of thestylus and record.

2. A miniature phonograph comprising a record disposed approximatelyhorizontally, a sound box disposed approximately vertically near therecord, a stylus arrn projecting from the sound box toward and over thesound grooves on the record, and vertical trunnions above and below thesound box pivoting the same for feed of the stylus over the record.

3. A miniature phonograph comprising a record disposed approximatelyhorizontally, a sound box disposed approximately vertically near therecord, a stylus arm projecting from the sound box toward and over thesound grooves on the record, vertical trunnions above and below saidsound box pivoting thc` same for feed of the stylus over the record,said sound box being vertically reciprocable on said trunnions forengagement and disengagement of thc stylus and record, and means limitngthe stylus pressure to a desired value.

4. A miniature phonograph comprising a disc record disposedapproximately horizontally, a sound box disposed approximatelyvertically near the edge of the record, a stylus arm projecting from thesound box toward and over the sound grooves on the record, verticaltrunnions above and below said sound box pivoting the same for feed ofthe stylus over the record, said sound box being vertically reciprocableon said trunnions for engagement and disengagement of the stylus andrecord, weight means balancing the sound box about the trunnions andserving to increase the sound box inertia, and resilient means urgingthe sound box upwardly and partially relieving the weight of the soundbox in order to limit the stylus pressure to a desired value.

5. A min'ature phonograph comprising a record, a sound box and styluscooperating therewith, a control cam shaft, a main spring andappropriate gearing for rotating the record and control cam shaft, saidcontrol cam shaft, cams. and associated followers including means tolift and reset the stylus during rewinding` of the phonograph.

6. A miniature phonograph comprising a record. a sound box and styluscooperating therewith, a control cam shaft arranged to rotate onerevolution or less during thc complete operation of the phonograph, amain spring and appropriate gearing for rotating the record and controlcam shaft, said control cam shaft, cams, and associated followersincluding means to reset the stylus during rewinding of the phonograph,means to lift the stylus during rewinding of the phonograph, and meansto make the lift means inoperative during playing of the record.

7. A miniature phonograph comprising a record, a sound box and siyluscooperating therewith, a control cam shaft arranged to oscillate onerevolution or less during the complete unwinding and rewinding of thephonograph, a main spring and appropriate gearing and governor mechanismforrotating the record and control cam shaft, said control cam shaft,cams, and associated followers including means to lift and to reset thestylus during rewinding of the phonograph, and means to disengage thelift means shortly after starting of the phonograph.

8. A miniature phonograph comprising a record,

`a sound box disposed near the record, a stylus arm projecting from thesound box toward and over the sound grooves on the record, trunnionsextending transversely of the sound box and pivoting the same for feedof the stylus over the record, said soundbox being reciprocable on saidtrunnions for engagement and disengagement of the stylus and record, acontrol cam shaft, a main spring and appropriate gearing for rotatingthe record and control cam shaft, said control cam shaft. cams, andassociated followers including means to lift and reset the stylus duringrewinding of the phonograph.

9. A miniature phonograph comprising a record disposed approximatelyhorizontally, a sound box disposed approximately vertically near therecord. a stylus arm projecting from the sound box toward and over thesound grooves on the record, vertical trunnions pivoting said sound boxfor feed of the stylus over the record, said sound box being verticallyreeiprocable on said trunnions for engagement and disengagement of thestylus and record, a control cam shaft arranged to rotate one revolutionor less during the com-` plete operation of the phonograph, a mainspringand appropriate gearing for rotating the record and ycontrol camshaft, said control cam shaft, cams, and associated followers includingmeans to lift and reset the stylus during rewinding of the phonograph. I

10. A miniature phonograph comprising a record disposed approximatelyhorizontally, a sound box disposed approximately vertically near therecord. a stylus arm projecting from the sound box toward and over thesound grooves on the record, vertical trunnions pivoting said sound boxfor feed of the stylus over the record, said sound box being verticallyreciprocable on said trunnions for engagement and disengagement of thestylus and record, a control cam shaft arranged to oscillate onerevolution or less during the complete unwinding and rewinding of thephonograph, a main spring and appropriate gearing for rotating therecord and control cam shaft, said control cam shaft, cams, andassociated followers including means to reset the stylus duringrewinding of the phonograph, means to lift the stylus during rewindingof the phonograph, and means to make the lift means inoperative duringplaying of the record.

11. A miniature phonograph comprising a disc record disposedhorizontally, a sound box disposed vertically near the edge of therecord, a stylus arm projecting from the sound box toward and over thesound grooves on the record, Vertical trunnions above and below saidsound box pivoting the same for feed of the stylus over the record, saidsound box being vertically reciprocable on said trunnions for engagementand disengagement of the stylus and record, a control cam shaft, a mainspring and appropriate gearing and governor mechanism for rotating therecord and control cam shaft, said control cam shaft, cams, andassociated followers including means to reset the stylus duringrewinding of the phonograph, means to lift the stylus during rewindingof the phonograph, and means to disengage the lift means shortly afterstarting of the phonograph.

12. A miniature phonograph comprising a record rotating shaft, a recordcarried thereby, a sound box and stylus cooperating therewith, a controlcam shaft arranged to oscillate one revolution or less during thecomplete unwinding and rewinding of the phonograph, a step-up gear trainbetween said cam shaft and the record shaft, a spring for driving saidgear train, said cam shaft including a stylus lift cam, an adjacentstylus lowering cam having a lift portion, a rider shiftable betweensaid cams, and means shifting said rider to the lift cam dui'- ingrewinding and to the lowering cam during unwinding of the main spring.

13. A miniature phonograph comprising a record rotating shaft, a recordcarried thereby, a sound box and stylus cooperating therewith, a

i control cam shaft arranged to oscillate one revolution or less duringthe complete unwinding and rewinding of the phonograph, a main springfor driving said cam shaft, a step-up gear train between said cam shaftand the record shaft, said cam shaft including a stylus reset camadapted to reset the stylus to initial position during rewinding of themain spring, a stylus lift cam of large radius, an adjacent styluslowering cam of small radius but having a lift portion of large radius,a rider shiftable between said cams, and means shifting said rider tothe lift cam during rewinding and tothe lowering cam during unwinding ofthe main spring.

14. A miniature phonograph comprising a record rotating shaft, a recordcarried thereby, a sound box and stylus cooperating therewith, a controlcam shaft, a main spring connected positively to and driving said camshaft, a step-up gear train between said cam shaft and the record shaft,said cam shaft including a stylus reset cam adapted to reset the stylusto initial position during rewinding of the main spring, a stylus liftcam of large radius. an adjacent stylus lowering cam of small radius buthaving a lift portion of large radius equal to that of the lift cam, arider shiftable between said cams, resilient means normally urging therider toward the lift cam, and a rider shifting cam for shifting therider from the lift to the lowering cam at the beginning of the playingoperation of the phonograph.

15. A miniature phonograph comprising a record shaft and record, a soundbox and stylus cooperating therewith, a control cam shaft, a main springfor driving said cam shaft, a stepup gearing connecting said cam shaftand a rewind shaft, additional step-up gearing connecting said rewindshaft to the record shaft, a rewind knob, releasable clutch meansbetween said knob and shaft, and means to prevent back rotation of theknob, said cam shaft including cams and followers to lift and reset thestylus during rewinding of the main spring. v'

16. A miniature phonograph'cornprising a record shaft and record, asound box and stylus cooperating therewith, a control cam shaft arrangedto rotate one revolution or less during the complete operation of thephonograph, a main spring for driving said cam shaft, step-up gearingconnecting said cam shaft and a rewind shaft, additional step-up gearingconnecting said rewind shaft to the record shaft, a rewind knob, clutchmeans between said knob and shaft engaged by axial movement of `theshaft, means to prevent back rotation of the knob, said cam shaftincluding a stylus reset cam, a stylus lift cam, an adjacent styluslowering cam having a lift portion, a rider mounted on and shiftablewith the rewind shaft between said cams, and means for shifting therider from the lift to the lowering cam and for disengaging the rewindclutch upon playing of the phonograph.

17. A miniature phonograph comprising a record shaft and record, a soundbox and stylus cooperating therewith, a control cam shaft arranged tooscillate one revolution or less during complete unwinding and rewindingof the phonograph. a main spring for driving said cam shaft, step-upgearing connecting said cam shaft and a rewind shaft, additional step-upgearing connecting said rewind shaft to the record shaft, a rewind knobcoaxial with said rewind shaft, clutch means between said knob and shaftengaged by axial movement of the shaft, means to prevent back rotationof the knob, a one-way clutch between said rewind shaft and the recordrotating gearing, said cam shaft including a stylus reset cam, a styluslift cam, an adjacent stylus lowering cam having a lift portion, a ridermounted on and shiftable with the rewind shaft between said cams,resilient means normally urging.

the rider toward the lift cam and the rewind clutch into engagement, anda rider shifting cam for shifting the rider from the lift to thelowering cam and for disengaging the rewind clutch to start thephonograph.

18. A miniature phonograph comprising a casing arranged horizontally,one end of said casing being closed and the other end of said casingbeing open for sound emission, a disc record mounted on a vertical shaftin said casing, a sound box arranged vertically near the closed end ofthe casing, a stylus arm projecting from the sound box toward and overthe record. and vertical bearings affording oscillation of the sound boxand stylus arm for feed of the stylus over the record, said bearingsalso affording vertical reciprocation of the sound box for engagementand disengagement of the stylus.

19. A miniature phonograph comprising a cylindrical casing arranged withits axis horizontal, one end of said casing being closed and the otherend of said casing being open for sound emission, a disc record mountedon a vertical shaft, a sound box arranged vertically near the closed endof the casing, a stylus arm projecting from the sound box toward andover the record, vertical bearings alfording oscillation ofv the soundbox and stylus arm for feed of the stylus over the record, said bearingsfurther affording lvertical reciprocation of the sound box forengagement and disengagement of thestylus, a main spring and gear trainfor rotating the record, and a rewind knob located at the sound emittingend of the casing.

20.. A miniature phonograph comprising a cylindrical casing arrangedwith its axis horizontal, one end of said casing being closed and theother end of said casing being open for sound emission, a disc recordmounted on a vertical shaft extending diametrically of the cylindricalcasing. a sound box arranged vertically near the closed end of thecasing, said sound box being closed on the side toward the closed end ofthe casing and open on the side toward the sound emitting end of thecasing, a stylus arm projecting from the Sound box toward and over therecord, vertical bearings affording oscillation of the sound box andstylus arm for feed of the stylus over the record4 said bearings furtheraffording vertical reciprocation of the sound box for engagement anddisengagement of the stylus, a main spring and gear train for rotatingthe record, a rewind knob located at the sound emitting end of thecasing, a control cam shaft, and appropriate cams on said control camshaft for elevating and resetting the stylus during rewinding of thephonograph.

LEO J. GRUBMAN.

